- Is this your corporate/organisation/enterprise/School Management iPhone? Then please contact the system administrator of your corporate//organisation/enterprise/School Management
- If it is your device, in that case, do you have any profile installed by your corporate/organisation/enterprise/School Management?
- Erase the profile added by you If you have installed a profile on your own --> Install or remove configuration profiles on iPhone - Apple ...
- Or please get in touch with the system administrator of the organization who provided the profile to you

A corporate profile installed on your iPhone could potentially be contributing to Guided Access quitting unexpectedly. Here's why:
- Restrictions: Corporate profiles can have restrictions placed on apps and functionalities. These restrictions might be limiting Guided Access
- Managed Apps: IT departments might deploy specific apps through the profile, potentially conflicting with Guided Access
- Security Settings: Corporate profiles often have stricter security settings that could affect feature behavior. This might be causing it.
Here's what you can do:
- Check with IT: The best course of action is to contact your IT department. They can explain the restrictions set by the corporate profile and see if Guided Access is affected. They might be able to adjust settings or suggest alternative apps approved for corporate use.
- Look for App Conflicts: See if your IT department uses a different app through the corporate profile. Conflicting apps might cause crashes.
Additional points to consider:
- Even if the profile isn't directly affecting Guided Access, it's still a good idea to check with IT. They might be aware of similar issues and have workarounds.
By working with IT and considering these possibilities, you can hopefully identify if the corporate profile is the culprit and find a solution that allows you to use Guided Access.